package com.atguigu.paymentdemo.config;


import com.wechat.pay.contrib.apache.httpclient.WechatPayHttpClientBuilder;
import com.wechat.pay.contrib.apache.httpclient.auth.PrivateKeySigner;
import com.wechat.pay.contrib.apache.httpclient.auth.WechatPay2Credentials;
import com.wechat.pay.contrib.apache.httpclient.auth.WechatPay2Validator;
import com.wechat.pay.contrib.apache.httpclient.util.PemUtil;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.nio.charset.StandardCharsets;
import java.security.PrivateKey;


@Configuration
@PropertySource("classpath:wxpay.properties") //读取配置文件
@ConfigurationProperties(prefix="wxpay") //读取wxpay节点
@Data //使用set方法将wxpay节点中的值填充到当前类的属性中
@Slf4j
public class WxPayConfig {

    // 商户号
    private String mchId;

    // 商户API证书序列号
    private String mchSerialNo;


    // APIv3密钥
    private String apiV3Key;

    // APPID
    private String appid;

    // 微信服务器地址
    private String domain;

    // 接收结果通知地址
    private String notifyDomain;

    // APIv2密钥
    private String partnerKey;

    /**
     * 获取商户的私钥文件
     * @param filename
     * @return
     */
    private PrivateKey getPrivateKey(String filename){

        try {
            return PemUtil.loadPrivateKey(new FileInputStream(filename));
        } catch (FileNotFoundException e) {
            throw new RuntimeException("私钥文件不存在", e);
        }
    }

    /**
     * 获取签名验证器
     * @return
     */
    //@Bean
//    public ScheduledUpdateCertificatesVerifier getVerifier(){
//
//        log.info("获取签名验证器");
//
//        //获取商户私钥
//        PrivateKey privateKey = getPrivateKey(privateKeyPath);
//
//        //私钥签名对象
//        PrivateKeySigner privateKeySigner = new PrivateKeySigner(mchSerialNo, privateKey);
//
//        //身份认证对象
//        WechatPay2Credentials wechatPay2Credentials = new WechatPay2Credentials(mchId, privateKeySigner);
//
//        // 使用定时更新的签名验证器，不需要传入证书
//        ScheduledUpdateCertificatesVerifier verifier = new ScheduledUpdateCertificatesVerifier(
//                wechatPay2Credentials,
//                apiV3Key.getBytes(StandardCharsets.UTF_8));
//
//        return verifier;
//    }
//
//
//    /**
//     * 获取http请求对象
//     * @param verifier
//     * @return
//     */
//    //@Bean(name = "wxPayClient")
//    public CloseableHttpClient getWxPayClient(ScheduledUpdateCertificatesVerifier verifier){
//
//        log.info("获取httpClient");
//
//        //获取商户私钥
//        PrivateKey privateKey = getPrivateKey(privateKeyPath);
//
//        WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
//                .withMerchant(mchId, mchSerialNo, privateKey)
//                .withValidator(new WechatPay2Validator(verifier));
//        // ... 接下来，你仍然可以通过builder设置各种参数，来配置你的HttpClient
//
//        // 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签，并进行证书自动更新
//        CloseableHttpClient httpClient = builder.build();
//
//        return httpClient;
//    }

    /**
     * 获取HttpClient，无需进行应答签名验证，跳过验签的流程
     */
    @Bean(name = "wxPayNoSignClient")
    public CloseableHttpClient getWxPayNoSignClient(){

        //获取商户私钥
//        PrivateKey privateKey = getPrivateKey(privateKeyPath);
//
//        //用于构造HttpClient
//        WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
//                //设置商户信息
//                .withMerchant(mchId, mchSerialNo, privateKey)
//                //无需进行签名验证、通过withValidator((response) -> true)实现
//                .withValidator((response) -> true);

        // 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签，并进行证书自动更新
        HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();

        CloseableHttpClient httpClient = httpClientBuilder.build();

        log.info("== getWxPayNoSignClient END ==");

        return httpClient;
    }

}
